Legalesign API
6.6#11 in e-signature apis softwareFrom £10 a monthWebAPI
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| Fact | Legalesign API | OpenSign |
|---|---|---|
| API access | Users must be approved for API development before they can generate API credentials. | Yes |
| Bulk sending | Yes | Yes |
| Free plan | No | Yes |
| Integrations | Legalesign lists integrations including Salesforce, Microsoft Power Automate, Voyager Infinity, LogicMelon, Recruitly, and Timesheet Portal. | The Professional plan lists Zapier integration, Dropbox import and custom Gmail or SMTP sending. |
You want what its maker publishes above — check its page for the details.
OpenSign may suit individuals and businesses that need PDF signing, reusable templates, or API-based signing workflows. It also offers self-hosting instructions for those who want to run it on Linux, macOS, or Windows.